Extraction of Fetal Electrocardiogram from Gutaneous Potential Recordings of a Pregnant Woman Using Time Delayed Decorrelation and Nonlinear Noise Reduction
Naoki Tanaka, Masayoshi Naitō, Kazutomo Yunokuchi · IEEJ Transactions on Electronics Information and Systems · 2002
The fetal electrocardiogram is extracted from cutaneous potential recordings of a pregnant woman. The cutaneous potential recordings are noisy mixtures of fetal and maternal source signals. To separate these signals we use time delayed decorrelation, which is an algorithm for independent component analysis. The separated signals are noisy source signals. In order to reduce the noise, we apply nonlinear noise reduction method to the separated fetal component. The extraction of fetal component is sufficiently successful although the fetal signals are much weaker than the maternal ones.